Examine source code of The Beatles rainbow walk

{
  "theme": {
    "images": {
      "theme_frame": "all-together-now-original_Beatles_header.jpg"
    },
    "colors": {
      "frame": "#dadfeb",
      "tab_background_text": "#f7f2f2"
    }
  },
  "version": "2.0",
  "name": "The Beatles rainbow walk",
  "manifest_version": 2,
  "description": "the Beatles music group rainbow silhouette"
}